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cristobalite
(redirected from Crystobalite)

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cristobalite [kri′stō·bə‚līt]
(mineralogy)
SiO2A silicate mineral that is a high-temperature form of quartz; stable above 1470°C; crystallizes in the tetragonal system at low temperatures and the isometric system at high temperatures.
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quartz 575[degrees]C- -Quartz 870[degrees]C -tridymite 1470[degrees]C- -cristobalite 1750[degrees]C liquid Of these phases, quartz is the most critical one in as much as it is susceptible to conversion during high temperature service to the less dense crystobalite and tridymite, which is the reason for the expansion taking place.
Production of silica-refractory bricks from white sand by Almarahle, Gazze / American Journal of Applied Sciences
 
 
 
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